Aradus pannosus VAN DUZEE, 1920

Heiss, Ernst & Barr, Cheryl, 2017, Seining watercourses, a new method for collecting flat bugs? (Hemiptera, Heteroptera, Aradidae), Linzer biologische Beiträge 49 (1), pp. 131-145 : 135

Aradus pannosus VAN DUZEE, 1920 ( Photo 4 , Figs 12, 13)

M a t e r i a l e x a m i n e d 333, 3♀♀ 25.IV.1992; 233, 1♀ 30.IV.2015; 13, 1♀ 28.V.2015; 1♀ 2. V.2016 ; 1♀ 12.V.2016 (13 specimens).

Specimens of the forma typica of A. pannosus show a yellowish apical ring on antennal segment II, but PARSHLEY 1921, described var. incomtus lacking this ring. The latter has been treated as a subspecies in the catalogs by KORMILEV & FROESCHNER 1987, and FROESCHNER 1988. However, as PARSHLEY loc.cit. stated, specimens from Marin Co. in California showed both antennal color variations, thus cannot be regarded as subspecies but are merely color variations of antennal segment II without taxonomic value. The specimens collected from El Dorado Canal debris have unicolored antennae. All literature records of this species are from California.

A d d i t i o n a l m a t e r i a l in CEHI: California:13 Stanford University, 26 V 1957 ; 1♀ Marin Co., Mill Valley , 28 V 1964 ; 13 Marin Co., Inverness, 27 IV 1957 ; 13 Fort Seward , 20 V 1935 ; 13 Strawberry Cyn., 16 II 1963 (all with dark antennal segment II); 13 Sta. Clara Co., Los Gatos, 6 V 1961 (with yellowish apical ring). Oregon: 1♀ Benton Co. , Dawson, 6 X 19962 ; 1♀ McMinnville, 29 IV 1957 and 1♀ 19 V 1958; 1♀ Corvallis, 5 V 1953 (all with dark antennal segment II) (new state records for Oregon) .

Aradus patibulus VAN DUZEE, 1927 ( Photo 2 , Figs 2, 4; Photo 5 , Fig. 17; Table I, Figs 6-10)

M a t e r i a l e x a m i n e d: 333, 1♀ 25.IV.1992; 233, 4♀♀ 30.IV.2015; 1♀ 8.VI.2015; 2♀♀ 2.V.2016; 13, 2♀♀ 12.V.2016; 233 27.V.2016 (18 specimens).

This striking, large species was described from specimens from Lassen Co, Martin’s

Springs, and later reported from other localities in California ( USINGER 1936, LINSLEY &

USINGER 1942, 1944). In the latter paper a male "Neoallotypus" was designated from

Miami Ranger Station, Mariposa County, which is deposited in EMEC, however, it has

no name-bearing function (ICZN, Recommendation 72A).

The dark coloration, large size and yellowish antennal segment III resemble that of A. ampliatus , however the latter never shows a complete yellowish antennal segment III and differs also in the shape of male genitalic structures and female terminal segments ( Table I, Figs 3, 8).

A d d i t i o n a l m a t e r i a l inCEHI: 1♀ California, Calaveras Co., NE Arnold, 1500m, 3 VIII 2013.

Figures

Photo 2: Figs 1-4. (1) Holotype female of Aradus linsleyi USINGER, 1936; (2) Holotype female of Aradus patibulus VAN DUZEE, 1927; (3, 4) labels attached to holotypes, deposited in the CAS. Photos courtesy of the CAS.

Photo 4: Figs 11-16. (11) Aradus compressus, female (7.7mm); (12) Aradus pannosus, male (5.8mm); (13) Aradus pannosus, female (6.6mm); (14) Aradus persimilis, male (6.2mm); (15) Aradus proboscideus, male (6.8mm); (16) Aradus proboscideus, female (8.3mm).

Photo 5: Figs 17-21. (17) Aradus patibulus, female (7.4mm); (18) Aradus crenatus, male (9.9mm) (Ontario, Prince Edward Co., CEHI); (19) Aradus linsleyi, male (8.6mm); (20) Mezira pacifica, male (6.1mm); (21) Mezira pacifica, female (7.6mm).